Last name เพ็ญพงษ์ (Penpong 
, เพ็ญพงษ์ ) , across the world, is a rare surname. The last name เพ็ญพงษ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, เพ็ญพงษ์ is the forename as well as the last name.